#ifndef TAGSH
#define TAGSH
-/* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2000 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+ gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
+
\f
/** This file defines the format of SCM values and cons pairs.
\f
+
/* In the beginning was the Word:
*/
-typedef long SCM;
+typedef long SCMWORD;
+/*
+ But as external interface, we use void*, which will be checked more strictly for
+ dubious conversions.
+ */
+#define SCM_VOIDP_TEST
+#ifndef SCM_VOIDP_TEST
+typedef SCMWORD SCM;
+#define SCM_ASWORD(x) (x)
+#define SCM_ASSCM(x) (x)
+#else
+typedef void * SCM;
+#define SCM_ASWORD(x) ((SCMWORD) (x))
+#define SCM_ASSCM(x) ((SCM) (x))
+#endif
+/* SCM_CARW is a convenience for treating the CAR of X as a word */
+#define SCM_CARW(x) SCM_ASWORD (SCM_CAR (x))
/* Cray machines have pointers that are incremented once for each word,
* to scm_vector elts, functions, &c are not munged.
*/
#ifdef _UNICOS
-# define SCM2PTR(x) ((int)(x) >> 3)
-# define PTR2SCM(x) (((SCM)(x)) << 3)
+# define SCM2PTR(x) ((int) (x) >> 3)
+# define PTR2SCM(x) (((SCM) (x)) << 3)
# define SCM_POINTERS_MUNGED
#else
# define SCM2PTR(x) (x)
-# define PTR2SCM(x) ((SCM)(x))
+# define PTR2SCM(x) ((SCM) (x))
#endif /* def _UNICOS */
\f
* (Not always impossible but it is fair to say that many details of tags
* are mutually dependent). */
-#define SCM_IMP(x) (6 & (SCM)(x))
-#define SCM_NIMP(x) (!SCM_IMP(x))
+#define SCM_IMP(x) (6 & SCM_ASWORD (x))
+#define SCM_NIMP(x) (!SCM_IMP (x))
/* Here is a summary of tagging in SCM values as they might occur in
* SCM variables or in the heap.
* stored in the SCM_CAR of a non-immediate object have a 1 in bit 1:
*/
-#define SCM_NCONSP(x) (1 & SCM_CAR(x))
-#define SCM_CONSP(x) (!SCM_NCONSP(x))
+#define SCM_SLOPPY_NCONSP(x) (1 & SCM_CARW (x))
+#define SCM_SLOPPY_CONSP(x) (!SCM_SLOPPY_NCONSP (x))
+
+#define SCM_NCONSP(x) (SCM_IMP (x) || SCM_SLOPPY_NCONSP (x))
+#define SCM_CONSP(x) (SCM_NIMP (x) && SCM_SLOPPY_CONSP (x))
/* SCM_ECONSP should be used instead of SCM_CONSP at places where GLOCS
* can be expected to occur.
*/
-#define SCM_ECONSP(x) (SCM_CONSP (x) \
- || (SCM_TYP3(x) == 1 \
- && SCM_CDR (SCM_CAR (x) - 1) != 0))
-#define SCM_NECONSP(x) (SCM_NCONSP(x) \
- && (SCM_TYP3(x) != 1 \
- || SCM_CDR (SCM_CAR (x) - 1) == 0))
+#define SCM_ECONSP(x) (SCM_NIMP (x) \
+ && (SCM_SLOPPY_CONSP (x) \
+ || (SCM_TYP3 (x) == 1 \
+ && SCM_CDR (SCM_CAR (x) - 1) != 0)))
+#define SCM_NECONSP(x) (SCM_IMP (x) \
+ || (SCM_SLOPPY_NCONSP (x) \
+ && (SCM_TYP3 (x) != 1 \
+ || SCM_CDR (SCM_CAR (x) - 1) == 0)))
\f
-#define SCM_CELLP(x) (!SCM_NCELLP(x))
-#define SCM_NCELLP(x) ((sizeof(scm_cell)-1) & (SCM)(x))
+#define SCM_CELLP(x) (!SCM_NCELLP (x))
+#define SCM_NCELLP(x) ((sizeof (scm_cell) - 1) & (SCMWORD) SCM_ASWORD (x))
/* See numbers.h for macros relating to immediate integers.
*/
-#define SCM_ITAG3(x) (7 & (SCM)x)
-#define SCM_TYP3(x) (7 & SCM_CAR(x))
+#define SCM_ITAG3(x) (7 & SCM_ASWORD (x))
+#define SCM_TYP3(x) (7 & SCM_CARW (x))
#define scm_tc3_cons 0
#define scm_tc3_cons_gloc 1
#define scm_tc3_int_1 2
-#define scm_tc3_closure 3
-#define scm_tc3_imm24 4
-#define scm_tc3_tc7_1 5
-#define scm_tc3_int_2 6
-#define scm_tc3_tc7_2 7
+#define scm_tc3_closure 3
+#define scm_tc3_imm24 4
+#define scm_tc3_tc7_1 5
+#define scm_tc3_int_2 6
+#define scm_tc3_tc7_2 7
/*
*/
-#define SCM_TYP7(x) (SCM_CAR(x) & 0x7f)
-#define SCM_TYP7S(x) (SCM_CAR(x) & (0x7f & ~2))
+#define SCM_TYP7(x) (0x7f & SCM_CARW (x))
+#define SCM_TYP7S(x) ((0x7f & ~2) & SCM_CARW (x))
-#define SCM_TYP16(x) (0xffff & SCM_CAR(x))
-#define SCM_TYP16S(x) (0xfeff & SCM_CAR(x))
-#define SCM_GCTYP16(x) (0xff7f & SCM_CAR(x))
+#define SCM_TYP16(x) (0xffff & SCM_CARW (x))
+#define SCM_TYP16S(x) (0xfeff & SCM_CARW (x))
+#define SCM_GCTYP16(x) (0xff7f & SCM_CARW (x))
/* Testing and Changing GC Marks in Various Standard Positions
*/
-#define SCM_GCMARKP(x) (1 & SCM_CDR(x))
-#define SCM_GC8MARKP(x) (0x80 & SCM_CAR(x))
-#define SCM_SETGCMARK(x) SCM_SETOR_CDR (x,1)
+#define SCM_GCMARKP(x) (1 & SCM_ASWORD (SCM_CDR (x)))
+#define SCM_GC8MARKP(x) (0x80 & SCM_CARW (x))
+#define SCM_SETGCMARK(x) SCM_SETOR_CDR (x, 1)
#define SCM_CLRGCMARK(x) SCM_SETAND_CDR (x, ~1L)
#define SCM_SETGC8MARK(x) SCM_SETOR_CAR (x, 0x80)
#define SCM_CLRGC8MARK(x) SCM_SETAND_CAR (x, ~0x80L)
* into structs or smobs. We need back some
* of these 7 bit tags!
*/
-#define scm_tc7_llvect 29
#define scm_tc7_pws 31
-#define scm_tc7_uvect 37
#define scm_tc7_lvector 39
+
+#ifdef HAVE_ARRAYS
+#define scm_tc7_llvect 29
+#define scm_tc7_uvect 37
#define scm_tc7_fvect 45
#define scm_tc7_dvect 47
#define scm_tc7_cvect 53
#define scm_tc7_svect 55
-#define scm_tc7_contin 61
-#define scm_tc7_cclo 63
-#define scm_tc7_rpsubr 69
#define scm_tc7_bvect 71
#define scm_tc7_byvect 77
#define scm_tc7_ivect 79
+#endif
+
+#define scm_tc7_contin 61
+#define scm_tc7_cclo 63
+#define scm_tc7_rpsubr 69
#define scm_tc7_subr_0 85
#define scm_tc7_subr_1 87
#define scm_tc7_cxr 93
*/
#define scm_tc7_port 125
-#define scm_tc16_fport (scm_tc7_port + 0*256L)
+#define scm_tc16_fport (scm_tc7_port + 0 * 256L)
/* scm_tc16_pipe was here. */
-#define scm_tc16_strport (scm_tc7_port + 2*256L)
-#define scm_tc16_sfport (scm_tc7_port + 3*256L)
+#define scm_tc16_strport (scm_tc7_port + 2 * 256L)
+#define scm_tc16_sfport (scm_tc7_port + 3 * 256L)
/* There are 256 smob subtypes. Here are the first four.
/* Some option bits begeinning at bit 16 of scm_tc16_flo:
*/
-#define SCM_REAL_PART (1L<<16)
-#define SCM_IMAG_PART (2L<<16)
-#define scm_tc_dblr (scm_tc16_flo|SCM_REAL_PART)
-#define scm_tc_dblc (scm_tc16_flo|SCM_REAL_PART|SCM_IMAG_PART)
+#define SCM_REAL_PART (1L << 16)
+#define SCM_IMAG_PART (2L << 16)
+#define scm_tc_dblr (scm_tc16_flo | SCM_REAL_PART)
+#define scm_tc_dblc (scm_tc16_flo | SCM_REAL_PART | SCM_IMAG_PART)
/* Smob types 2 and 3:
#define scm_tc16_bigpos 0x027f
#define scm_tc16_bigneg 0x037f
+/* Smob type 4: this is allocated, but not initialized cells;
+ this is required to prevent the gc from hosing your cells if
+ you have to allocate while creating the cell*/
+
+#define scm_tc16_allocated 0x047f
+
\f
/* {Immediate Values}
scm_tc8_iloc = 0xfc
};
-#define SCM_ITAG8(X) ((SCM)(X) & 0xff)
-#define SCM_MAKE_ITAG8(X, TAG) (((X)<<8) + TAG)
-#define SCM_ITAG8_DATA(X) ((X)>>8)
+#define SCM_ITAG8(X) (SCM_ASWORD (X) & 0xff)
+#define SCM_MAKE_ITAG8(X, TAG) SCM_ASSCM (((X) << 8) + TAG)
+#define SCM_ITAG8_DATA(X) (SCM_ASWORD (X) >> 8)
\f
*/
/* SCM_ISYMP tests for ISPCSYM and ISYM */
-#define SCM_ISYMP(n) ((0x187 & (SCM)(n))==4)
+#define SCM_ISYMP(n) ((0x187 & SCM_ASWORD (n)) == 4)
/* SCM_IFLAGP tests for ISPCSYM, ISYM and IFLAG */
-#define SCM_IFLAGP(n) ((0x87 & (SCM)(n))==4)
-#define SCM_ISYMNUM(n) ((SCM)((n)>>9))
-#define SCM_ISYMCHARS(n) (scm_isymnames[SCM_ISYMNUM(n)])
-#define SCM_MAKSPCSYM(n) (((n)<<9)+((n)<<3)+4L)
-#define SCM_MAKISYM(n) (((n)<<9)+0x74L)
-#define SCM_MAKIFLAG(n) (((n)<<9)+0x174L)
+#define SCM_IFLAGP(n) ((0x87 & SCM_ASWORD (n)) == 4)
+#define SCM_ISYMNUM(n) (SCM_ASWORD (n) >> 9)
+#define SCM_ISYMCHARS(n) (scm_isymnames[SCM_ISYMNUM (n)])
+#define SCM_MAKSPCSYM(n) SCM_ASSCM (((n) << 9) + ((n) << 3) + 4L)
+#define SCM_MAKISYM(n) SCM_ASSCM (((n) << 9) + 0x74L)
+#define SCM_MAKIFLAG(n) SCM_ASSCM (((n) << 9) + 0x174L)
extern char *scm_isymnames[]; /* defined in print.c */
*
*/
-#define SCM_IM_AND SCM_MAKSPCSYM(0)
-#define SCM_IM_BEGIN SCM_MAKSPCSYM(1)
-#define SCM_IM_CASE SCM_MAKSPCSYM(2)
-#define SCM_IM_COND SCM_MAKSPCSYM(3)
-#define SCM_IM_DO SCM_MAKSPCSYM(4)
-#define SCM_IM_IF SCM_MAKSPCSYM(5)
-#define SCM_IM_LAMBDA SCM_MAKSPCSYM(6)
-#define SCM_IM_LET SCM_MAKSPCSYM(7)
-#define SCM_IM_LETSTAR SCM_MAKSPCSYM(8)
-#define SCM_IM_LETREC SCM_MAKSPCSYM(9)
-#define SCM_IM_OR SCM_MAKSPCSYM(10)
-#define SCM_IM_QUOTE SCM_MAKSPCSYM(11)
-#define SCM_IM_SET_X SCM_MAKSPCSYM(12)
-#define SCM_IM_DEFINE SCM_MAKSPCSYM(13)
-#define SCM_IM_APPLY SCM_MAKISYM(14)
-#define SCM_IM_CONT SCM_MAKISYM(15)
-#define SCM_BOOL_F SCM_MAKIFLAG(16)
-#define SCM_BOOL_T SCM_MAKIFLAG(17)
-#define SCM_UNDEFINED SCM_MAKIFLAG(18)
-#define SCM_EOF_VAL SCM_MAKIFLAG(19)
-#define SCM_EOL SCM_MAKIFLAG(20)
-#define SCM_UNSPECIFIED SCM_MAKIFLAG(21)
-#define SCM_IM_DISPATCH SCM_MAKISYM(22)
-#define SCM_IM_SLOT_REF SCM_MAKISYM(23)
-#define SCM_IM_SLOT_SET_X SCM_MAKISYM(24)
+#define SCM_IM_AND SCM_MAKSPCSYM (0)
+#define SCM_IM_BEGIN SCM_MAKSPCSYM (1)
+#define SCM_IM_CASE SCM_MAKSPCSYM (2)
+#define SCM_IM_COND SCM_MAKSPCSYM (3)
+#define SCM_IM_DO SCM_MAKSPCSYM (4)
+#define SCM_IM_IF SCM_MAKSPCSYM (5)
+#define SCM_IM_LAMBDA SCM_MAKSPCSYM (6)
+#define SCM_IM_LET SCM_MAKSPCSYM (7)
+#define SCM_IM_LETSTAR SCM_MAKSPCSYM (8)
+#define SCM_IM_LETREC SCM_MAKSPCSYM (9)
+#define SCM_IM_OR SCM_MAKSPCSYM (10)
+#define SCM_IM_QUOTE SCM_MAKSPCSYM (11)
+#define SCM_IM_SET_X SCM_MAKSPCSYM (12)
+#define SCM_IM_DEFINE SCM_MAKSPCSYM (13)
+#define SCM_IM_APPLY SCM_MAKISYM (14)
+#define SCM_IM_CONT SCM_MAKISYM (15)
+#define SCM_BOOL_F SCM_MAKIFLAG (16)
+#define SCM_BOOL_T SCM_MAKIFLAG (17)
+#define SCM_UNDEFINED SCM_MAKIFLAG (18)
+#define SCM_EOF_VAL SCM_MAKIFLAG (19)
+#define SCM_EOL SCM_MAKIFLAG (20)
+#define SCM_UNSPECIFIED SCM_MAKIFLAG (21)
+#define SCM_IM_DISPATCH SCM_MAKISYM (22)
+#define SCM_IM_SLOT_REF SCM_MAKISYM (23)
+#define SCM_IM_SLOT_SET_X SCM_MAKISYM (24)
/* Multi-language support */
-#define SCM_IM_NIL_COND SCM_MAKISYM(25)
-#define SCM_IM_NIL_IFY SCM_MAKISYM(26)
-#define SCM_IM_T_IFY SCM_MAKISYM(27)
-#define SCM_IM_0_COND SCM_MAKISYM(28)
-#define SCM_IM_0_IFY SCM_MAKISYM(29)
-#define SCM_IM_1_IFY SCM_MAKISYM(30)
-#define SCM_IM_BIND SCM_MAKISYM(31)
-
-#define SCM_IM_DELAY SCM_MAKISYM(32)
+#define SCM_IM_NIL_COND SCM_MAKISYM (25)
+#define SCM_IM_NIL_IFY SCM_MAKISYM (26)
+#define SCM_IM_T_IFY SCM_MAKISYM (27)
+#define SCM_IM_0_COND SCM_MAKISYM (28)
+#define SCM_IM_0_IFY SCM_MAKISYM (29)
+#define SCM_IM_1_IFY SCM_MAKISYM (30)
+#define SCM_IM_BIND SCM_MAKISYM (31)
+
+#define SCM_IM_DELAY SCM_MAKISYM (32)
+
+/* When a variable is unbound this is marked by the SCM_UNDEFINED
+ * value. The following is an unbound value which can be handled on
+ * the Scheme level, i.e., it can be stored in and retrieved from a
+ * Scheme variable. This value is only intended to mark an unbound
+ * slot in GOOPS. It is needed now, but we should probably rewrite
+ * the code which handles this value in C so that SCM_UNDEFINED can be
+ * used instead. It is not ideal to let this kind of unique and
+ * strange values loose on the Scheme level.
+ */
+#define SCM_UNBOUND SCM_MAKIFLAG (33)
-#define SCM_UNBNDP(x) (SCM_UNDEFINED==(x))
+#define SCM_UNBNDP(x) (SCM_UNDEFINED == (x))
\f
-/* Dispatching aids:
- */
+/* Dispatching aids: */
/* For cons pairs with immediate values in the CAR
HCoop / bpt / guile.git / blobdiff